/usr/include/gromacs/gmx_simd_vec.h is in gromacs-dev 4.6.5-1build1.
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* This file is part of the GROMACS molecular simulation package.
*
* Copyright (c) 1991-2000, University of Groningen, The Netherlands.
* Copyright (c) 2001-2012, The GROMACS Development Team
* Copyright (c) 2012,2013, by the GROMACS development team, led by
* David van der Spoel, Berk Hess, Erik Lindahl, and including many
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/* The macros in this file are intended to be used for writing
* architecture-independent SIMD intrinsics code.
* To support a new architecture, adding macros here should be (nearly)
* all that is needed.
*/
/* This file contains vector operation functions using SIMD intrinsics.
* gmx_simd_macros.h should be included before including this file.
*/
#ifndef _gmx_simd_vec_h_
#define _gmx_simd_vec_h_
#ifndef _gmx_simd_macros_h_
#error "gmx_simd_macros.h was not included before including gmx_simd_vec.h"
#endif
/* x^2 + y^2 + z^2 */
static gmx_inline gmx_mm_pr
gmx_calc_rsq_pr(gmx_mm_pr x, gmx_mm_pr y, gmx_mm_pr z)
{
return gmx_madd_pr(z, z, gmx_madd_pr(y, y, gmx_mul_pr(x, x)));
}
/* inner-product of multiple vectors */
static gmx_inline gmx_mm_pr
gmx_iprod_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az,
gmx_mm_pr bx, gmx_mm_pr by, gmx_mm_pr bz)
{
gmx_mm_pr ret;
ret = gmx_mul_pr(ax, bx);
ret = gmx_madd_pr(ay, by, ret);
ret = gmx_madd_pr(az, bz, ret);
return ret;
}
/* norm squared of multiple vectors */
static gmx_inline gmx_mm_pr
gmx_norm2_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az)
{
gmx_mm_pr ret;
ret = gmx_mul_pr(ax, ax);
ret = gmx_madd_pr(ay, ay, ret);
ret = gmx_madd_pr(az, az, ret);
return ret;
}
/* cross-product of multiple vectors */
static gmx_inline void
gmx_cprod_pr(gmx_mm_pr ax, gmx_mm_pr ay, gmx_mm_pr az,
gmx_mm_pr bx, gmx_mm_pr by, gmx_mm_pr bz,
gmx_mm_pr *cx, gmx_mm_pr *cy, gmx_mm_pr *cz)
{
*cx = gmx_mul_pr(ay, bz);
*cx = gmx_nmsub_pr(az, by, *cx);
*cy = gmx_mul_pr(az, bx);
*cy = gmx_nmsub_pr(ax, bz, *cy);
*cz = gmx_mul_pr(ax, by);
*cz = gmx_nmsub_pr(ay, bx, *cz);
}
/* a + b + c + d (not really a vector operation, but where else put this?) */
static gmx_inline gmx_mm_pr
gmx_sum4_pr(gmx_mm_pr a, gmx_mm_pr b, gmx_mm_pr c, gmx_mm_pr d)
{
return gmx_add_pr(gmx_add_pr(a, b), gmx_add_pr(c, d));
}
#endif /* _gmx_simd_vec_h_ */
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